TC65 Hardware Interface Description
Strictly confidential / Draft
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TC65_HD_V00.521 Page 4 of 99 24.05.2005
3.13.1 Speech Processing................................................................................55
3.13.2 Microphone Circuit.................................................................................55
3.13.2.1 Single-ended Microphone Input.............................................................55
3.13.2.2 Differential Microphone Input.................................................................56
3.13.2.3 Line Input Configuration with OpAmp ....................................................57
3.13.3 Loudspeaker Circuit...............................................................................58
3.13.4 Digital Audio Interface DAI.....................................................................59
3.14 Control Signals ....................................................................................................61
3.14.1 Synchronization Signal ..........................................................................61
3.14.2 Using the SYNC Pin to Control a Status LED........................................62
4 Antenna Interface........................................................................................................63
4.1 Antenna Installation .............................................................................................63
4.2 Antenna Pad ........................................................................................................65
4.2.1 Suitable Cable Types.............................................................................65
4.3 Antenna Connector..............................................................................................66
5 Electrical, Reliability and Radio Characteristics......................................................70
5.1 Absolute Maximum Ratings .................................................................................70
5.2 Operating Temperatures......................................................................................70
5.3 Pin Assignment and Signal Description...............................................................71
5.4 Power Supply Ratings .........................................................................................77
5.5 Electrostatic Discharge ........................................................................................80
5.6 Reliability Characteristics.....................................................................................81
6 Mechanics....................................................................................................................82
6.1 Mechanical Dimensions of TC65 .........................................................................82
6.2 Mounting TC65 to the Application Platform .........................................................84
6.3 Board-to-Board Application Connector ................................................................85
7 Sample Application.....................................................................................................88
8 Reference Approval ....................................................................................................90
8.1 Reference Equipment for Type Approval.............................................................90
8.2 Compliance with FCC Rules and Regulations.....................................................91
9 Appendix......................................................................................................................92
9.1 List of Parts and Accessories ..............................................................................92
9.2 Fasteners and Fixings for Electronic Equipment .................................................94
9.2.1 Fasteners from German Supplier ETTINGER GmbH ............................94
9.3 Data Sheets of Recommended Batteries ............................................................97
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